Get clr to return null in Javascript

Anon

Below is the code I'm using, I need the syntax to get the javascript code to output nothing when the clr is clicked.

this.wwrite("<TABLE WIDTH='" + (v_Width-30) + "' BORDER=0 CELLPADDING=0 BGCOLOR='#000099'><TR><TD>" +  
	"<TABLE BORDER=0 WIDTH='100%' CELLPADDING=1 BGCOLOR='#B7B7C7'>" +  
	"<TR><TD BGCOLOR='#000099'>" + 
	"<FONT COLOR=white FACE='" + fontface + "' SIZE=2><B>" + this.gTitle + "</B></FONT>" + 
	"</TD><TD BGCOLOR='#000099' ALIGN=RIGHT>" + 
	"<FONT COLOR=white FACE='" + fontface + "' SIZE=2><B>" + 
	"<A HREF='javascript:" +
	this.WHO + "Calendar.Close(\"" + this.gType + "\", \"" + this.INLINE + "\");' " +
	"onClick='" + onClickFn('11/17/2002'));"' " +
	"window.close();return true;' " +
	"STYLE='color:white'>" + 
	"Clr</A>&nbsp;&nbsp;);' " +		
	"<A HREF='javascript:" +
	this.WHO + "Calendar.Close(\"" + this.gType + "\", \"" + this.INLINE + "\");' " +
	"STYLE='color:white'>" + 
	"Cancel</A></B></FONT></TD></TR><TR>");